Site Work and Concrete Flashcards
7 cards from real General Contractor License practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Site Work and Concrete flashcards as text
What does the term 'slump' measure in fresh concrete?
Answer: Workability and consistency of the mix
Slump measures the workability and consistency of fresh concrete by how much a standard cone of concrete settles.
Which type of retaining wall relies primarily on its own weight for stability?
Answer: Gravity wall
A gravity retaining wall resists lateral earth pressure through its own mass and weight without reinforcement.
What is the minimum curing period for most structural concrete under normal temperature conditions?
Answer: 7 days
A minimum of 7 days of continuous moist curing is required for most structural concrete to achieve adequate early strength.
During grading operations, 'cut' refers to:
Answer: Excavating earth to lower an existing grade
Cut is the excavation of existing earth to reduce the elevation to a desired grade level.
What additive is used in concrete to reduce the water-cement ratio while maintaining workability?
Answer: Water reducer (plasticizer)
Water reducers (plasticizers) allow a lower water-cement ratio while keeping the mix workable, improving strength and durability.
A percolation test is performed on a site primarily to determine:
Answer: Soil absorption rate for septic system sizing
A percolation (perc) test measures how quickly water drains through soil, which is essential for sizing septic drain fields.
Which concrete placement method is most appropriate for thin slabs and areas difficult to reach by chute?
Answer: Concrete pump
A concrete pump can efficiently deliver concrete to thin slabs and remote or confined areas where truck chutes cannot reach.